Method of making door handles



Patented Sept'. 7, 1926.

UNITED STATES, PATENT oFFlca.

JOHN Ri EHRBAR, OF DETROIT, MICHIGAN, `A SSIGNOB, TO TERNSTEDT MANU,FACEIFI'J'IRA 'ING COMPANY, OF DETROIT," MICHIGAN, A CORPORATION OF MICHIGAN.-

METHOD or 'MAKING Doon HANDLES.

application med Maya, 1925. serial No. 27,154.

This invention relates to a process for the manufacture of automobiledoor-lglr'andles. It 'is the object' of the inventionftoprovide a roce'ss for the manufacture Tof vornamental I andles which will reach almost the limit of leconomy in manufacturing cost.

It has 'been the practice heretofore to manufacture ornamental door handles for automobile bodies by treating the same to a coating of pyroxylin enamel. A portion of this enamel has then been stripped by hand to expose the underlying nickel-plated portions to give the handle the necessary ornamentation.

This process, has been satisfactory, but it is a relatively expensive one, as the' stripping Voperation is a slow hand operation.

In the drawings: Fig. 1 is a section through the dies. d1Fig. 2 is a perspective of the finished hane. Fig. 3 isa cross section through the dies. A stamping in the form of a shell or frame, preferably of brass, is'made by suit- 25 able dies, and punched. This frame `has an under-turned edge a, and overlying iiange a', and an enameled plate or insert c is made of strip metal stock and suitably enameled,

as by dipping. The frame, together with the insert, is laid .in a set of dies in a die-casting machine. These dies open in two ways and are tri-partite. The back die b is provided with a socket arranged to have fitted thereinto the shell or frame, andA the enameled insert. One forward die d is arranged to have tted thereinto the'shank e which is rolled bar stock put through a screw machine to recess it, as at'f.

It will be'obvious that when thedies are opened up one first inserts the brass shell and the enamel plate in the back die. He

next fitsl the "shank e andthe forward.

died. Thisthen closes upon theback die and the other forward 'die g closes. in on the other two dies. The molten die-casting alf' loy is then shot through thel ates k. This serves to make the Wh'o e one integral v4casting, in which the body of the handle,

l the outer shell, the enameled plate, and the roll bar shank lock together. It will be seen Vthat the recess f serves to securely key and lock the shank into the body and the casting, while the underlying and overlying flanges la and a of the shell serve to lock the shell into the casting. 'f The .brass shell is preferably nickel-plated.

What I claim is: 1. The method of constructing a door handle which comprises the insertion of an venameled plate in a shell having .an overly- -ing vand underlying flange, then the placing y of these elements inA a set o f die-casting diesl mental door handle which comprises the? inserting an ornamental plate in a. shell wilt/hl an overlyin andunderlying flange, placing the shell wlth its plate in a set of die-casting dies .together with a shank, closing the dies and passing thereinto a fluid metal part of which iiows between the plate and the shell, and which upon setting cast-unites the shell'and plate and the shank with the body of the handle.

4. The method of constructing a door handle with an ornamental grip portion, which comprises la ing a frame vmember in the' grip. portion o a mold, placing an ornamental plate in said frame, and then in' troducin molten metal into the mold behind sai plate to .form the grip portion of the `handle and unitingthe frame and ornamental plate to such grip portion.

5. The method of constructing` an ornamental door handle whichcomprises laying la frame memberin a mold,` placing an ornamental-plate within the frame member, closing the mold, and `introducing a fluid metal into the moldand between theornamental l `l JoHNR; EHRBAR. 

